US6197415B1 - Gel-coated materials with increased flame retardancy - Google Patents
Gel-coated materials with increased flame retardancy Download PDFInfo
- Publication number
- US6197415B1 US6197415B1 US09/235,569 US23556999A US6197415B1 US 6197415 B1 US6197415 B1 US 6197415B1 US 23556999 A US23556999 A US 23556999A US 6197415 B1 US6197415 B1 US 6197415B1
- Authority
- US
- United States
- Prior art keywords
- gel
- coated
- foam
- materials
- base material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000000463 material Substances 0.000 title claims abstract description 158
- 239000006260 foam Substances 0.000 claims description 55
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 150000004703 alkoxides Chemical class 0.000 claims description 16
- 239000012782 phase change material Substances 0.000 claims description 15
- 229910044991 metal oxide Inorganic materials 0.000 claims description 11
- 150000004706 metal oxides Chemical class 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 239000011651 chromium Substances 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 239000002759 woven fabric Substances 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052776 Thorium Inorganic materials 0.000 claims description 2
- 229910052770 Uranium Inorganic materials 0.000 claims description 2
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- 229910052738 indium Inorganic materials 0.000 claims description 2
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- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 239000010955 niobium Substances 0.000 claims description 2
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- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 claims 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims 1
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims 1
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 229910000323 aluminium silicate Inorganic materials 0.000 claims 1
- 229910052785 arsenic Inorganic materials 0.000 claims 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims 1
- 229910052788 barium Inorganic materials 0.000 claims 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims 1
- 229910052791 calcium Inorganic materials 0.000 claims 1
- 239000011575 calcium Substances 0.000 claims 1
- 229910017052 cobalt Inorganic materials 0.000 claims 1
- 239000010941 cobalt Substances 0.000 claims 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims 1
- 229910003455 mixed metal oxide Inorganic materials 0.000 claims 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims 1
- 229910052700 potassium Inorganic materials 0.000 claims 1
- 239000011591 potassium Substances 0.000 claims 1
- 229910052707 ruthenium Inorganic materials 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052712 strontium Inorganic materials 0.000 claims 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims 1
- 239000010937 tungsten Substances 0.000 claims 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 claims 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 42
- 238000003980 solgel method Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 7
- 239000002253 acid Substances 0.000 abstract description 4
- 150000007513 acids Chemical class 0.000 abstract description 4
- 239000000499 gel Substances 0.000 description 84
- 239000002585 base Substances 0.000 description 33
- 239000011248 coating agent Substances 0.000 description 24
- -1 polyethylene Polymers 0.000 description 22
- 239000002243 precursor Substances 0.000 description 22
- 238000006243 chemical reaction Methods 0.000 description 20
- 239000003446 ligand Substances 0.000 description 19
- 210000004027 cell Anatomy 0.000 description 18
- 238000000034 method Methods 0.000 description 15
- 239000002904 solvent Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
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- 229920000642 polymer Polymers 0.000 description 12
- 239000004744 fabric Substances 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 10
- 239000003063 flame retardant Substances 0.000 description 10
- 238000006460 hydrolysis reaction Methods 0.000 description 10
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- 239000003054 catalyst Substances 0.000 description 8
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- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 4
- 125000003545 alkoxy group Chemical group 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
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- 230000003647 oxidation Effects 0.000 description 4
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- 125000001424 substituent group Chemical group 0.000 description 4
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- 0 *O[Si](*=O)(O*)O* Chemical compound *O[Si](*=O)(O*)O* 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- GOLCXWYRSKYTSP-UHFFFAOYSA-N Arsenious Acid Chemical compound O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
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- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
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- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 2
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- QHWKHLYUUZGSCW-UHFFFAOYSA-N Tetrabromophthalic anhydride Chemical compound BrC1=C(Br)C(Br)=C2C(=O)OC(=O)C2=C1Br QHWKHLYUUZGSCW-UHFFFAOYSA-N 0.000 description 1
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- GHPGOEFPKIHBNM-UHFFFAOYSA-N antimony(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Sb+3].[Sb+3] GHPGOEFPKIHBNM-UHFFFAOYSA-N 0.000 description 1
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- MKJXYGKVIBWPFZ-UHFFFAOYSA-L calcium lactate Chemical compound [Ca+2].CC(O)C([O-])=O.CC(O)C([O-])=O MKJXYGKVIBWPFZ-UHFFFAOYSA-L 0.000 description 1
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- 229910001981 cobalt nitrate Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(II) oxide Inorganic materials [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
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- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 1
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- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 description 1
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- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
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- 150000002739 metals Chemical class 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- RJMRIDVWCWSWFR-UHFFFAOYSA-N methyl(tripropoxy)silane Chemical compound CCCO[Si](C)(OCCC)OCCC RJMRIDVWCWSWFR-UHFFFAOYSA-N 0.000 description 1
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- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
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- RPESBQCJGHJMTK-UHFFFAOYSA-I pentachlorovanadium Chemical compound [Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[V+5] RPESBQCJGHJMTK-UHFFFAOYSA-I 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
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- 239000001103 potassium chloride Substances 0.000 description 1
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- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
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- 150000004760 silicates Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
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- 238000002791 soaking Methods 0.000 description 1
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- 230000002195 synergetic effect Effects 0.000 description 1
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- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
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- 239000004416 thermosoftening plastic Substances 0.000 description 1
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 description 1
- VGBPIHVLVSGJGR-UHFFFAOYSA-N thorium(4+);tetranitrate Chemical compound [Th+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VGBPIHVLVSGJGR-UHFFFAOYSA-N 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 1
- 150000004684 trihydrates Chemical class 0.000 description 1
- RMUKCGUDVKEQPL-UHFFFAOYSA-K triiodoindigane Chemical compound I[In](I)I RMUKCGUDVKEQPL-UHFFFAOYSA-K 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- NSBGJRFJIJFMGW-UHFFFAOYSA-N trisodium;stiborate Chemical compound [Na+].[Na+].[Na+].[O-][Sb]([O-])([O-])=O NSBGJRFJIJFMGW-UHFFFAOYSA-N 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten(VI) oxide Inorganic materials O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 1
- KUKDDTFBSTXDTC-UHFFFAOYSA-N uranium;hexanitrate Chemical compound [U].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O KUKDDTFBSTXDTC-UHFFFAOYSA-N 0.000 description 1
- 229910002007 uranyl nitrate Inorganic materials 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
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- 229940105965 yttrium bromide Drugs 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 235000004416 zinc carbonate Nutrition 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/20—After-treatment of capsule walls, e.g. hardening
- B01J13/22—Coating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/365—Coating
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/08—Heat resistant; Fire retardant
- A41D31/085—Heat resistant; Fire retardant using layered materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/06—Open cell foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/08—Closed cell foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/02—Cellular or porous
- B32B2305/022—Foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2437/00—Clothing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10S428/92—Fire or heat protection feature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10S428/921—Fire or flameproofing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/249976—Voids specified as closed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/249986—Void-containing component contains also a solid fiber or solid particle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/249987—With nonvoid component of specified composition
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/249992—Linear or thermoplastic
- Y10T428/249993—Hydrocarbon polymer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2631—Coating or impregnation provides heat or fire protection
Definitions
- the invention relates to gel-coated materials suitable for use in applications in which flame retardancy is a highly desired characteristic, and methods for fabricating such materials.
- Materials desirably made fire resistant include polymeric materials, both natural and synthetic, woven and nonwoven fabrics, fibers, matting and batting. From a chemical structure perspective, low flammability can be achieved by introducing ring structures, and side groups which are not readily oxidized. For example, aromatic polyimides show excellent fire resistance, but are too costly for routine use.
- a more common approach is to introduce one or more fire-retardant constituents to an inherently flammable material, such as in the case of a flammable polymer.
- the additive can be a fire-retardant monomer which is copolymerized to some degree with the inherently flammable monomer.
- the additive can be an unreactive material which is coated onto the material post-production, or molded or extruded with a polymeric material in a physical blend.
- the inherently flammable material could also be reactively treated with a fire-retardant additive after polymer production, as in the chlorination of polymers such as polyethylene.
- Compounds which have found use as fire-retardants include inorganic compounds such as antimony compounds, including antimony trioxide, antimony pentoxide, and sodium antimonate. Boron compounds such as zinc borate, boric acid and sodium borate. Alumina trihydrate and molybdenum oxides are also useful inorganic compounds.
- Halogenated compounds have also been used, including decabromodiphenyl oxide, chlorendic acid, tetrabromophthalic anhydride, and similarly halogenated compounds. These halogenated compounds, especially chlorinated compounds, are often combined with the above-mentioned inorganic compounds, especially antimony-, iron-, cobalt-, nickel-, molybdenum-, and other metal-containing compounds, to produce synergistic fire-retarding effects.
- the invention uses gel coatings on base materials to greatly increase the fire retardance of such materials.
- the gel coatings can be produced through sol-gel processing of foamed materials.
- the gel coating provides a degree of physical and flame protection for the materials thus produced.
- the oxidative resistance of such materials is improved as well.
- the coating is believed to minimize oxygen contact with the material. This can result in reduced incidence of oxidation from atmospheric oxygen for the materials, or any components contained within the materials, for example, reduced flammability for flammable contents, or reduced chemical oxidation for atmospheric oxidation-sensitive contents.
- the contents which can be included in the gel-coated materials include phase change materials in various forms.
- the invention further provides a method for providing a gel coating on a material by a sol-gel process.
- the invention provides flame-retardancy without altering the physical processing of the material, while undesirable alteration is commonly the case when inert halogen-containing additives are added.
- the gel-coated materials of the invention possess excellent light stability, in contrast to many halogen-based and phosphorus-based flame-retardant materials.
- the thermal stability of the gel-coated materials of the invention is at least as high as the untreated material; this is often not the case for halogen-based flame-retardant materials, which can produce corrosive hydrogen halides upon exposure to heat.
- the density of the gel-coated materials of the invention is lower than that of halogen-containing fire-retardant materials.
- the invention provides a gel-coated material having permanent fire-retardant properties.
- the gel-coated materials of the invention are noncombustible, maintain their integrity upon exposure to flame, and seal the material completely from fire.
- the gel coatings are easily applied, and can easily be modified, with, for example, coloring agents.
- the gel coatings are repeatedly washable with commonly available solvents, and the fire-retardancy is retained upon such repeated washing.
- the gel-coated materials of the invention possess excellent hydrolytic and chemical resistance, whereas phosphorus-containing flame-retardant materials generally do not.
- Base materials generally described are adapted to be placed within articles of clothing including footwear and various articles of protective clothing designed for environments of extreme temperature and hazard from fire.
- a base material such as a foamed polymer, fiber, woven or nonwoven fabric, batting or matting is coated with a gel coating.
- the gel coating can also provide increased resistance to chemical reactants such as acids, bases and other chemicals that can damage or dissolve foamed materials.
- Such materials are ideal in protective clothing, for example, fire fighting suits.
- Gel-coated foamed materials are suitable for flame-resistant cushions used in aircraft, automobiles, furniture and other cushioned articles. Fabrics, matting and batting are other applications for which the invention is suited.
- the gel-coated materials of the invention can also contain heat control agents, such as those which store latent heat.
- heat control agents include phase change materials, which can be integral to the base materials or gel coatings of the invention.
- metal oxides, and metal alkoxides also include those materials which are calcinable (or otherwise oxidizible) to metal oxides, and metal alkoxides, as described below.
- calcination includes oxidation processes in general.
- a flammable base material can be inherently flammable, or can become flammable upon the introduction of flammable materials in the interior or exterior of the base material.
- the gel-coated materials of the invention feature base materials coated with a gel, specifically a gel produced by sol-gel processing.
- the gel coating provides flame-, physical- and chemical-resistances to the coated material, resulting in enhanced performances in critical applications.
- the materials which are coated with a gel can be fabrics, fibers, matting, batting or polymeric materials.
- Useful polymeric materials can be foamed polymeric materials, for example, foam insulation layers of footwear or garments.
- the burning of polymeric materials is highly influenced by the density of materials in general. Most unexpanded plastic polymers have densities commonly in the range of at least 0.7 g/cm 3 and at most 1.5 g/cm 3 . On the other hand, foamed polymeric materials have densities of about 0.03 g/cm 3 , so that only a few percent (typically less than 5%) of the total volume of these foams is solid polymer. The presence of so much gas in the structure of a foamed polymer influences the burning characteristics greatly.
- thermoset foams in contrast, are highly crosslinked. Flame does not cause them to melt appreciably, so that the material does not recede from the advancing flame front. If the thermoset foam is intrinsically flammable, a rapid ignition of the entire foam can ensue.
- Fire-resistant coatings are generally of two types, intumescent and nonintumescent. Intumescence is the expansion of a coating into a foamlike carbonaceous char upon heating. Continuous heating of intumescent coatings pyrolyzes them into heat-resistant carbonaceous foam-like coatings.
- the coating used to coat the foamed polymeric materials of the present invention is a gel coating.
- the gel is prepared by a process known as the sol-gel coating process.
- a colloid is a suspension in which the dispersed phase is not affected by gravitational forces, due to the dimensions of the dispersed phase (1-1000 nm).
- a sol is a colloidal suspension of solid particles in a liquid.
- a gel can be considered to be the agglomeration of these particles into a structure of macroscopic dimensions, such that it extends throughout the solution. It is, therefore, a substance that contains a continuous solid skeleton enclosing a continuous liquid phase.
- Sol-gel processing according to this invention involves chemical processing of gel precursors to prepare a colloid.
- These gel precursors consist of metal atoms surrounded by ligands.
- the metal atoms and the ligands fall into wide classes described below.
- chemical processing of the gel precursors involves hydrolysis and condensation reactions in which the ligands of the precursors are replaced by bonds to the ligands of other metal or metalloid elements. This process results in a growing network of metal or metalloid elements linked together, eventually forming a gel.
- the gels for use in the invention can be prepared via reactions which use monomeric, metal oxides as gel precursors.
- Metal oxides for use in sol-gel processing are generally represented by M(—OH 2 ) n (aquo ligand), M(—OH) n (hydroxo ligand), and M( ⁇ O) n (oxo ligand), where M is the metal atom, and n depends on the coordination state of M.
- Metal oxides for use in such reactions include TiO 2 , ZrO 2 , RuO 2 , RuO 4 , V 2 O 5 , WO 3 , ThO 2 , Fe 2 O 3 , MgO, Y 2 O 3 , HfO 2 , Nb 2 O 5 , UO 2 , BeO, CoO, NiO, CuO, ZnO, In 2 O 3 , Sb 2 O 3 , Al 2 O 3 and SnO 2 .
- ZeroO—TiO 2 TiO 2 —Fe 2 O 3 , SnO 2 —TiO 2 , Nd 2 O 3 —TiO 2 , Al 2 O 3 —Cr 2 O 3 , MgO—Al 2 O 3 , MgO—TiO 2 , MgO—ZrO 2 , ThO 2 —UO 2 , ThO 2 —CeO 2 , Bi 2 O 3 —TiO 2 , BeO—Al 2 O 3 , TiO 2 —Fe 2 O 3 —Al 2 O 3 , Al 2 O 3 —Cr 2 O 3 —Fe 2 O 3 , PbO—ZrO 2 —TiO 2 , ZnO—Al 2 O 3 —Cr 2 O 3 , Al 2 O 3 —Cr 2 O 3 —Fe 2 O 3 —TiO 2 , and ThO 2 —Al 2 O
- dispersions or sols of the ceramic metal oxides in combination or admixture with dispersions or sols of one or more metal oxides which are unstable in normal air environment (such as Li 2 O, Na 2 O, K 2 O, CaO, SrO, and BaO) and/or ceramic oxides having an atomic number of 14 or greater (such as SiO 2 , As 2 O 3 , and P 2 O 5 ), representative combinations including Al 2 O 3 —Li 2 O, TiO 2 —K 2 O, ZrO 2 —CaO, ZrO 2 —Al 2 O 3 —CaO, ZrO 2 —SrO, TiO 2 —BaO, B 2 O 3 —SiO 2 , TiO 2 —ZrO 2 —BaO, Al 2 O 3 —Na 2 O, TiO 2 —SiO 2 , MgO—SiO 2 , Fe 2 O 3 —BaO, ZrO 2
- the precursor material in the form of dispersions or sols of the oxides
- the precursor materials in the form of water soluble or dispersible inorganic or organic compounds which are calcinable, or otherwise oxidizible, to the corresponding metal oxide or metalloid oxide.
- These compounds representatively include many carboxylates and alcoholates, e.g., acetates, formates, oxalates, lactates, propylates, citrates, and acetylacetonates, and salts of mineral acids, e.g., bromides, chlorides, chlorates, nitrates, sulfates, and phosphates, selection of the particular precursor compound being dictated by availability and ease of handling.
- Representative calcinable precursor compounds useful in this invention include ferric chloride or nitrate, chromium chloride, cobalt nitrate, nickel chloride, copper nitrate, zinc chloride or carbonate, lithium propylate, sodium carbonate or oxalate, potassium chloride, beryllium chloride, magnesium acetate, calcium lactate, strontium nitrate, barium acetate, yttrium bromide, zirconium acetate, hafnium oxychloride, vanadium chloride, ammonium tungstate, aluminum chloride, indium iodide, titanium acetylacetonate, stannic sulfate, lead formate, bismuth nitrate, neodymium chloride, phosphoric acid, cerium nitrate, uranium nitrate, and thorium nitrate.
- the sol-gels for use in the invention can also be prepared via reactions which use monomeric, metal alkoxide precursors.
- This class of compounds is represented by M(OR) n , where M is a metal, OR is an alkoxide (an alkoxide with from one to six carbons which may be further substituted), and n is from 2 to 8, depending on the coordination state of the metal.
- the metals used in the metal alkoxide precursors are Ti, Cr, W, Th, Fe, Mg, Y, Zr, Hf, V, Nb, U, Be, Co, Ni, Cu, Zn, In, Sb, Al, Sn and Si.
- the alkoxy ligands are generally alkoxides with from one to six carbons such as methoxy, ethoxy, propoxy, butoxy, pentoxy, and hexoxy ligands, or substituted or unsubstituted aryloxy groups.
- Oligomeric precursors can be used such as ethoxypolysiloxane (ethyl polysilicate), hexamethoxydisiloxane (Si 2 (OCH 3 ) 6 ) and octamethoxytrisilioxane (Si 3 (OCH 3 ) 8 ).
- the monomeric, tetrafunctional alkoxysilane precursors are represented by the following formula.
- RO is a C 1 -C 6 substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group.
- Typical examples include methoxy, ethoxy, n-propoxy, n-butoxy, 2-methoxyethoxy, and phenylphenoxy groups.
- Ethoxypolysiloxane ethyl polysilicate
- hexamethoxydisiloxane Si 2 (OCH 3 ) 6
- octamethoxytrisilioxane Si 3 (OCH 3 ) 8
- Si 3 (OCH 3 ) 8 can also be used, as well as the cubic octamer (Si 8 O 12 )(OCH 3 ) 8 .
- Organically modified silicates having various organic ligands can be used, such as those formed by combining tetraalkoxysilanes with alkyl-or aryl-substituted and organofunctional alkoxysilanes.
- Organic functionality can be introduced to the alkoxy ligands with substituents such as —(CH 2 ) n1 NH 2 , —(CH 2 ) n1 NHCO—O—NH 2 , —(CH 2 ) n1 S(CH 2 ) n2 CHO, and like substituents, where n1 and n2 are from 0 to 6.
- Polymerizible ligands can also be employed, such as epoxides, to form organic networks in addition to an inorganic network. Choice of precursor can be made according to solubility or thermal stability of the ligands.
- organotrialkoxysilanes (R′Si(OR) 3 ) or diorganodialkoxysilanes (R′ 2 Si(OR) 2 ) can be used as gel precursors.
- the groups R′ need not be the same as each other on a given precursor molecule. Examples of such precursors are methyltriethoxysilane, methyltrimethoxysilane, methyltri-n-propoxysilane, phenyltriethoxysilane, and vinyltriethoxysilane.
- Catalysts are optionally but generally present in sol-gel processing.
- Acids and bases are suitable catalysts for sol-gel processing as carried out in the invention. Such catalysts facilitate both hydrolysis and condensation reactions, and can play a role in product structures.
- Preferred catalysts include inorganic acids (e.g., hydrochloric, nitric, sulfuric and hydrofluoric acid), amines including ammonia and ammonium hydroxide, organic acids (e.g., acetic acid), bases (e.g., potassium hydroxide), potassium fluoride, metal alkoxides (e.g., titanium alkoxide, vanadium alkoxide). All other factors being equal, acid catalysis produces gels which are cross-linked to a lesser extent than gels produced by base catalysis.
- a suitable catalyst for the sol-gel processing reactions of the invention is nitric acid.
- Sol-gel processing can take place in the presence of solvents.
- solvents include water, alcohols (e.g., methanol, ethanol), amides (e.g., formamide, dimethylformamide), ketones (e.g., acetone), nitrites (e.g., acetonitrile), and aliphatic or alicyclic ethers (e.g., diethyl ether, tetrahydrofuran, or dioxane).
- solvents can facilitate hydrolysis reactions as described below, especially if the ligands present on the sol-gel precursor molecules are bulky, such as phenylphenoxy ligands.
- the first reaction generally taking place is hydrolysis, in which the alkoxide ligands of the alkoxysilanes are replaced by hydroxide ligands, from water. This reaction is represented here.
- RO is a C 1 -C 6 substituted or unsubstituted alkoxy group, or substituted or unsubstituted aryloxy group.
- the product of this reaction is an alcohol, reducing the need for alcohol or other mutual solvents as the reaction proceeds. Since the reaction is reversible, the alcohol can also participate in reverse reactions, reesterification and transesterification. All substituents attached to silicon are labile, and populations of substituents will depend in an equilibrium sense on control exerted over the concentrations of alcohol and water, the type of catalyst used and the extent of reaction.
- the alkoxide ligand is likely to be protonated as a first step, making it a better leaving group as water attacks from the backside of the central silicon atom. Seemingly for this reason, steric effects of the ligands play a significant role in determining the rate of this reaction.
- dissociation of water to produce hydroxide ion likely takes place. The hydroxide attacks the backside of the central silicon atom, displacing the alkoxide ion. Inductive effects of the ligands are likely to be important here since the silicon atom develops charge in the transition state.
- the subsequent condensation reactions can either be between Si—OR and Si—OH or between two molecules of Si—OH to produce a silicate gel as shown in the following reactions.
- silicate gel formation is distinct from that of organic polymers, in that the silicic acid (Si(OH) 4 ) polymerizes into discrete particles. These particles then aggregate into chains and networks.
- the resulting macroscopic structure of the gel can be characterized as either a dense network with well-defined solid-liquid interfaces, a uniformly porous network, or an open network.
- This gel is then desirably applied to a base material, and dried to eventually produce a glassy material.
- Dried gels are referred to as xerogels or aerogels. Xerogels are produced by evaporation of liquid, while aerogels are dried by supercritical extraction of solvent. During this phase of the process, consolidation of the gel occurs. This process is also referred to as curing. The rate of curing gives control over the porosity of the resulting gel coating.
- the gel initially tends to shrink as liquid is removed, through removal of liquid at the surface of the gel.
- the amount of shrinkage that occurs initially is dependent both on how the gel is produced and how it is dried. Drying by evaporation of solvent produces xerogels which are denser than aerogels produced by supercritical extraction of liquid.
- gels produced through acid-catalysis are cross-linked to a lesser extent. Such gels shrink more during initial drying because the structures can interpenetrate each other more. The pores in such a gel are smaller, so that capillary pressure which is exerted during final stages of drying further compacts the structure.
- the resulting gel is characterized by an extremely fine texture.
- the pores in gels produced by acid-catalysis and drying by evaporation range in size from 10 to 50 ⁇ .
- gel coatings of metal oxides, metalloid oxides or the compounds calcinable (or otherwise oxidizible) to such oxides are produced on the surface of a base material.
- the gel coatings desirably provide a continuous coating on the surface of the base material.
- the base material can be a foamed polymeric material.
- This material can be hydrophobic, hydrophilic or amphipathic.
- exemplary of acceptable polymers are polyurethane, polypropylene, butyl, silicone, cellulose acetate, neoprene, epoxy, polystyrene, phenolic, and polyvinyl chloride.
- Foams such as styrofoam are not particularly well suited for the gel-coatings of the invention, and are not preferred.
- the foamed material should not react appreciably with the sol used to produce the gel in such a way as to structurally weaken the foamed material.
- foamed material Limited chemical reaction with the surface of the foamed material may take place, and in fact may be beneficial in certain applications, for example, on silicon foam.
- materials such as a moldable foamed organic plastic.
- the foamed materials need not be inherently flammable.
- Foams such as silicon foams are not inherently flammable, but if a flammable material is contained within the interior, or on the surface of, a non-flammable foam, a gel coating is useful.
- the gel coatings of the invention are equally useful with open- or closed cell foams.
- an open cell foam is preferred.
- An open cell foam structure also allows for the possibility that the entire foam can become impregnated with the gel coating.
- uncured sol can be removed by squeezing the open cell foam after it has been soaking in the sol to clear air passages and allow the foam to remain breathable.
- Open cell foams with particularly fine cell structure could become impermeable in this way, however, as the air passages could conceivably become solidified.
- Foams with closed cell structures will only have gel coatings on their exposed surfaces, since the uncured sol will not penetrate to the interior of a closed cell foam.
- open or closed cell foam is made based on the particular application. If a high level of flame resistance is necessary, an open cell foam is preferred, as it will absorb a much greater amount of sol than a closed cell foam. If the foam is required to remain relatively lightweight, a closed cell foam may be better, since its interior will remain as an uncoated foam. This also makes the bulk properties of gel-coated closed cell foams similar to those of uncoated closed cell foams, since the vast majority of the foam is unaffected by the coating, and its physical properties are largely retained.
- the base material can also be a fabric. Suitable fabrics include those typically used for clothing materials, such as natural fabrics, including cotton, linen, wool, hemp, jute, ramie, silk, mohair, vicuna, and the like. Other fabrics include man-made fabrics such as organic polymer fabrics including rayon, viscose, acetate, azlon, acrylic, aramid, nylon, olefin, polyester, spandex, vinyon and the like. Such fabrics can be knitted, woven or nonwoven.
- the base material may also be the fibers or filaments of the materials listed above which are composed of fibers or filaments. In either case, the gel coating is applied in essentially the same way as described for polymeric materials and foamed polymeric materials.
- Such base materials in addition to themselves having a potential for flammability, may contain other desirable constituents which are independently flammable, and may render an otherwise nonflammable base material flammable by virtue of their flammability. In such cases, the gel-coated materials of the invention also provide protection against flame.
- phase change materials include materials which can absorb heat and protect an underlying material from overheating. Thermal energy is absorbed by the phase change of such materials without causing an increase in the temperature of these materials.
- Suitable phase change materials include paraffinic hydrocarbons, that is, straight chain hydrocarbons represented by the formula C n H n+2 , where n can range from 13 to 28.
- Other compounds which are suitable for phase change materials are 2,2-dimethyl-1,3-propane diol (DMP), 2-hydroxymethyl-2-methyl-1,3-propane diol (HMP) and similar compounds. Also useful are the fatty esters such as methyl palmitate.
- Preferred phase change materials are paraffinic hydrocarbons.
- Such constituents can be encapsulated, as is desired in the case of phase change materials. Such encapsulated constituents can further be encapsulated in microcapsules.
- the microcapsules can be made from a wide variety of materials, including polyethylene, polypropylenes, polyesters, polyvinyl chloride, tristarch acetates, polyethylene oxides, polypropylene oxides, polyvinylidene chloride or fluoride, polyvinyl alcohols, polyvinyl acetates, urethanes, polycarbonates, and polylactones. Further details on microencapusulation are to be found in U.S. Pat. Nos. 5,589,194 and 5,433,953. Microcapsules suitable for use in the base materials of the present invention have diameters from about 1.0 to 2,000 microns.
- Such constituents can be introduced to the base materials pre- or post-manufacture, that is, before or after the material is formed in its final state. This depends on the nature of the constituent, and whether it can survive the manufacturing or processing of the base material and still retain its desired function, or whether the manufacturing or processing can impart new and desired functionality to the constituent.
- a microencapusulated phase change material is to be introduced into a foamed polymeric material, it could be dispersed throughout the polymeric material prior to the foaming of the polymer.
- the microencapusulated phase change material could be dispersed throughout the polymeric material so that it forms a product in which the microcapsules are individually surroundingly encapsulated and embedded within the base material.
- phase change material could be pressed directly into the foam after it is made, for example, by pressing the microcapsules into the foam with an applicating instrument.
- Gel coatings can be formed on base materials containing various loadings of phase change containing additives. The fire-retardant capabilities of the sol-gel can suppress the flammability of any flammable phase change materials.
- the invention also provides a method for producing gel-coated materials, by the method of sol-gel processing.
- base materials as described above are mixed with a sol which is allowed to cure into a gel.
- Sols are generally prepared by mixing metal-containing gel precursor and solvent together in a precursor/solvent ratio which can vary from about 3:1 to about 5:1 by volume. Preferably, the precursor/solvent ratio varies from about 3.5:1 to about 4.3:1. Separately, catalyst and water are mixed in a catalyst/water ratio which can vary from about 1:12 to about 1:22 by volume. The two solutions are mixed together with stirring.
- the mixture warms and subsequently cools, the onset and completion of reaction is indicated.
- the mixture is contacted with a base material surface.
- the mixture can be sprayed onto the material, brushed onto the material, or the material can be dipped into the sol.
- Spraying of the sol onto an article is however, less likely to result in a continuous coating on the base material surface.
- a sprayed sol is likely to cure more rapidly than a brushed sol, for example. In certain instances, this is a desirable situation.
- spraying may be the best way to avoid prolonged contact with the sol which would occur if the base material were soaked in, or brushed with a sol. If further materials are to be included, they can be included directly in the sol before curing creates a gel.
- a gel-coated foamed silicon material was prepared. The procedure required handling materials that are hazardous to human health. Suitable protective equipment was worn and appropriate precautions were taken to prevent the inhalation of any hazardous solvents, and particular care was taken to avoid the inhalation or skin contact with nitric acid and tetraethyl orthosilicate. No open flames were allowed in the vicinity during the procedure. The reactions were carried out in a fume hood with a filter for volatile organic compounds. The operator wore protective clothing, latex gloves, protective goggles and a respirator for dust and volatile organic compounds. All transfers were done by pipette.
- Ethanol (16.5 mL of 95% ethanol) and 63 mL of 98% tetraethyl orthosilicate (TEOS) were added to a 150 mL polypropylene or polymethyl propylene container, and mixed well.
- 20.4 mL of deionized water and 1.62 g of nitric acid were mixed.
- the acidic solution was added to the TEOS solution and stirred with a Teflon-coated stirring stick for 30 minutes. The mixture was observed to become warm and then cool as the reaction was completed.
- This material was placed in a shallow tray and a sample of open cell silicon foam was placed in the sol. The foam was soaked in the sol long enough to fully cover all surface, and then removed. Excess sol was removed by squeezing and wringing of the foamed material. Open cell foams may need to be squeezed while in the sol to ensure coverage of all exposed cell surfaces. The foam was left to cure overnight.
- Gel-coated polyurethane was prepared similarly, and produced a somewhat more brittle coating, although the open cell structure of the foam was retained.
- the gel coatings described herein can also be applied to fabrics, or individual natural and man-made fibers, thereby imparting fire-, physical-, and chemical-resistance to those materials.
- the application of the sol to fabrics or fibers would be undertaken according to methods which are analogous to those described for foamed polymeric materials.
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Dispersion Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Laminated Bodies (AREA)
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Abstract
Description
Claims (17)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
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US09/235,569 US6197415B1 (en) | 1999-01-22 | 1999-01-22 | Gel-coated materials with increased flame retardancy |
AT00904470T ATE460223T1 (en) | 1999-01-22 | 2000-01-21 | YELLOW COATED MATERIALS WITH INCREASED FLAME RETARDANT PROPERTIES |
JP2000594637A JP2002535164A (en) | 1999-01-22 | 2000-01-21 | Gel coating materials with increased flame retardancy |
DE60043979T DE60043979D1 (en) | 1999-01-22 | 2000-01-21 | Gel-coated materials with increased flame-retardant properties |
AU26222/00A AU2622200A (en) | 1999-01-22 | 2000-01-21 | Gel-coated materials with increased flame retardancy |
PCT/US2000/001455 WO2000043197A1 (en) | 1999-01-22 | 2000-01-21 | Gel-coated materials with increased flame retardancy |
EP00904470A EP1152885B1 (en) | 1999-01-22 | 2000-01-21 | Gel-coated materials with increased flame retardancy |
US09/771,285 US6696145B2 (en) | 1999-01-22 | 2001-01-26 | Gel-coated materials with increased flame retardancy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/235,569 US6197415B1 (en) | 1999-01-22 | 1999-01-22 | Gel-coated materials with increased flame retardancy |
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US09/771,285 Division US6696145B2 (en) | 1999-01-22 | 2001-01-26 | Gel-coated materials with increased flame retardancy |
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US6197415B1 true US6197415B1 (en) | 2001-03-06 |
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US09/235,569 Expired - Lifetime US6197415B1 (en) | 1999-01-22 | 1999-01-22 | Gel-coated materials with increased flame retardancy |
US09/771,285 Expired - Fee Related US6696145B2 (en) | 1999-01-22 | 2001-01-26 | Gel-coated materials with increased flame retardancy |
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US09/771,285 Expired - Fee Related US6696145B2 (en) | 1999-01-22 | 2001-01-26 | Gel-coated materials with increased flame retardancy |
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US (2) | US6197415B1 (en) |
EP (1) | EP1152885B1 (en) |
JP (1) | JP2002535164A (en) |
AT (1) | ATE460223T1 (en) |
AU (1) | AU2622200A (en) |
DE (1) | DE60043979D1 (en) |
WO (1) | WO2000043197A1 (en) |
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CN111627586A (en) * | 2020-06-09 | 2020-09-04 | 上海孚邦实业有限公司 | Lead-free protective clothing |
CN114752105A (en) * | 2022-04-18 | 2022-07-15 | 深圳市锦昊辉实业发展有限公司 | Preparation method of flame-retardant material |
CN115044177A (en) * | 2022-08-16 | 2022-09-13 | 杭州和顺科技股份有限公司 | Flame-retardant master batch, polyester composite film and preparation method thereof |
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ATE460223T1 (en) | 2010-03-15 |
WO2000043197A1 (en) | 2000-07-27 |
DE60043979D1 (en) | 2010-04-22 |
AU2622200A (en) | 2000-08-07 |
US6696145B2 (en) | 2004-02-24 |
EP1152885A1 (en) | 2001-11-14 |
EP1152885B1 (en) | 2010-03-10 |
JP2002535164A (en) | 2002-10-22 |
US20010006865A1 (en) | 2001-07-05 |
EP1152885A4 (en) | 2007-03-14 |
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